My BH is with 2 different types of entrance hole.
This is an open roof type at the front side and there is a pool to cool the BH.
This is the Dog Kennel entrance at the staircase area
Currently there are 6 bird nests, there is no CCTV installed and I am not sure the popular entrance holes of the swiftlet of the BH!!!! For the open roof, sometime I visit the BH and can see some swiftlet flying in & out.
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